In the 60s were in flux just about everywhere. The times, they were a-changing.
Memín was mainstream pop culture. And also, in some ways, popular culture, as opposed to ruling-class culture, very present on TV. It had, somehow, an anti-white-rich sentiment, since the only real mean character was Ricardito's mother, who wanted her blond boy not to blend with lower class children (two mestizos, one black).
During the same decade, another comic book character arose. Calzonzin, a Tarascan indian, from Michoacán.
The comic book, "Los Agachados" (The Ducking Ones) was very political. The cartoonist, Rius, later became a member of the Mexican Workers Party, and was known in Europe for his books: "Marx for Beginners", "Jesus for Beginners", etc.
Calzonzin, a popular hero of his time (even a film was made about him) wasn't handsome, either: